Bridge swivel design and construction method in extremely asymmetric state

Abstract

The invention relates to a method of finishing bridge swivel design and construction through arrangement of an auxiliary supporting system in an extremely asymmetric state. The method mainly aims at avoiding the situation that swivel balance is difficult to achieve only depending on arrangement of a balance weight at the end of a beam when the imbalance bending moment of a swivel bridge is relatively large. According to the method, besides a swivel center spherical hinge, the auxiliary supporting system is arranged in the position certain distance away from the center spherical hinge at the bottom of a long swivel arm side beam and matched with a balance weight at the top of a short swivel arm side beam to act jointly, so that balance and stability in the imbalance structure swivel processare kept. The auxiliary supporting system is arranged below a main beam in the position corresponding to the auxiliary supporting system, a beam bottom supporting column is arranged above an idler wheel trolley, and a main beam and the idler wheel trolley are connected through a bogie frame. The idler wheel trolley is supported on an arc-shaped track beam, and a rack is welded to the track beam.Power driving is supplied by a variable frequency motor and a speed reducer, transmission is conducted through a gear and the rack, the bogie frame is driven by a speed reducer frame, the idler wheeltrolley is driven by the bogie frame to move along the track beam, and therefore the main beam is driven to rotate.

Description

technical field [0001] The invention relates to the technical field of bridge design and construction, in particular to a design and construction method for completing bridge rotation by setting an auxiliary support system in an extremely asymmetrical state. Background technique [0002] With the development of our country's society and economy, the number of cars keeps increasing, and the resulting traffic congestion in large and medium-sized cities is also becoming more and more serious, which has become a bottleneck restricting urban development. In order to alleviate the current situation of urban traffic congestion, the construction of municipal infrastructure has also entered a period of construction climax in recent years. [0003] For large central cities, the railway traffic is generally relatively developed, often forming a trend of railway siege. While the railway brings convenience, it also has a certain impact on the construction and development of the city. Du...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the large unbalanced bending moment due to the asymmetry of the swivel beam sections on both sides of the ball joint and the great difference in length. Balanced swivel bridge, in order to realize this unbalanced swivel, a design and construction method of bridge swivel under extremely asymmetric state is proposed

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